Guo Xiurong, Gao Qi, Du Danfeng, Sun Chaowei
College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, China.
School of Traffic and Transportation, Northeast Forestry University, Harbin 150040, China.
Materials (Basel). 2021 May 8;14(9):2441. doi: 10.3390/ma14092441.
As a kind of novel porous ceramics, wood ceramics can be used for filtration, friction, energy storage and electrode materials, etc. In current work, the carbon based wood ceramics (C WCMs) was prepared using pine wood powder and phenolic resin as starting materials. The effects of filling rate of wood powder and resin concentration on pore characteristics and properties of C WCMs were characterized and analyzed with different techniques. Furthermore, the association among porosity of C WCMs, filling rate of wood powder and resin concentration was explored with multiple regression model. The results showed that: increasing the resin concentration and the filling rate of wood powder can improve the mechanical properties of C WCMs, but reduce the porosity and air permeability; when resin concentration is more than 50%, a large amount of caking will appear in the C WCMs, causing internal defects; changing the filling rate under a certain resin concentration can obtain the C WCMs with better pore structure; the porosity of C WCMs has a good linear relationship with resin concentration and filling rate, under the condition that sintering process and the size of wood powder are determined.
作为一种新型多孔陶瓷，木质陶瓷可用于过滤、摩擦、储能及电极材料等领域。在当前工作中，以松木粉和酚醛树脂为原料制备了碳基木质陶瓷（C WCMs）。采用不同技术对木粉填充率和树脂浓度对C WCMs孔隙特征及性能的影响进行了表征和分析。此外，利用多元回归模型探究了C WCMs孔隙率、木粉填充率和树脂浓度之间的关联。结果表明：提高树脂浓度和木粉填充率可改善C WCMs的力学性能，但会降低孔隙率和透气率；当树脂浓度超过50%时，C WCMs中会出现大量结块现象，导致内部缺陷；在一定树脂浓度下改变填充率可获得具有较好孔隙结构的C WCMs；在烧结工艺和木粉尺寸确定的条件下，C WCMs的孔隙率与树脂浓度和填充率具有良好的线性关系。
